#include "apr_strings.h"
#include "apr_md4.h"
#include "apr_lib.h"
#if APR_HAVE_STRING_H
#include <string.h>
#endif
#if APR_HAVE_UNISTD_H
#include <unistd.h>
#endif
#define S11 3
#define S12 7
#define S13 11
#define S14 19
#define S21 3
#define S22 5
#define S23 9
#define S24 13
#define S31 3
#define S32 9
#define S33 11
#define S34 15
static void MD4Transform(apr_uint32_t state[4], const unsigned char block[64]);
static void Encode(unsigned char *output, const apr_uint32_t *input,
unsigned int len);
static void Decode(apr_uint32_t *output, const unsigned char *input,
unsigned int len);
static unsigned char PADDING[64] =
{
0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
#if APR_CHARSET_EBCDIC
static apr_xlate_t *xlate_ebcdic_to_ascii;
#endif
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (y)) | ((x) & (z)) | ((y) & (z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
#define FF(a, b, c, d, x, s) { \
(a) += F ((b), (c), (d)) + (x); \
(a) = ROTATE_LEFT ((a), (s)); \
}
#define GG(a, b, c, d, x, s) { \
(a) += G ((b), (c), (d)) + (x) + (apr_uint32_t)0x5a827999; \
(a) = ROTATE_LEFT ((a), (s)); \
}
#define HH(a, b, c, d, x, s) { \
(a) += H ((b), (c), (d)) + (x) + (apr_uint32_t)0x6ed9eba1; \
(a) = ROTATE_LEFT ((a), (s)); \
}
APU_DECLARE(apr_status_t) apr_md4_init(apr_md4_ctx_t *context)
{
context->count[0] = context->count[1] = 0;
context->state[0] = 0x67452301;
context->state[1] = 0xefcdab89;
context->state[2] = 0x98badcfe;
context->state[3] = 0x10325476;
#if APR_HAS_XLATE
context->xlate = NULL;
#endif
return APR_SUCCESS;
}
#if APR_HAS_XLATE
APU_DECLARE(apr_status_t) apr_md4_set_xlate(apr_md4_ctx_t *context,
apr_xlate_t *xlate)
{
apr_status_t rv;
int is_sb;
rv = apr_xlate_sb_get(xlate, &is_sb);
if (rv != APR_SUCCESS) {
return rv;
}
if (!is_sb) {
return APR_EINVAL;
}
context->xlate = xlate;
return APR_SUCCESS;
}
#endif
APU_DECLARE(apr_status_t) apr_md4_update(apr_md4_ctx_t *context,
const unsigned char *input,
apr_size_t inputLen)
{
unsigned int i, idx, partLen;
#if APR_HAS_XLATE
apr_size_t inbytes_left, outbytes_left;
#endif
idx = (unsigned int)((context->count[0] >> 3) & 0x3F);
if ((context->count[0] += ((apr_uint32_t)inputLen << 3))
< ((apr_uint32_t)inputLen << 3))
context->count[1]++;
context->count[1] += (apr_uint32_t)inputLen >> 29;
partLen = 64 - idx;
#if !APR_HAS_XLATE
if (inputLen >= partLen) {
memcpy(&context->buffer[idx], input, partLen);
MD4Transform(context->state, context->buffer);
for (i = partLen; i + 63 < inputLen; i += 64)
MD4Transform(context->state, &input[i]);
idx = 0;
}
else
i = 0;
memcpy(&context->buffer[idx], &input[i], inputLen - i);
#else
if (inputLen >= partLen) {
if (context->xlate) {
inbytes_left = outbytes_left = partLen;
apr_xlate_conv_buffer(context->xlate, (const char *)input,
&inbytes_left,
(char *)&context->buffer[idx],
&outbytes_left);
}
else {
memcpy(&context->buffer[idx], input, partLen);
}
MD4Transform(context->state, context->buffer);
for (i = partLen; i + 63 < inputLen; i += 64) {
if (context->xlate) {
unsigned char inp_tmp[64];
inbytes_left = outbytes_left = 64;
apr_xlate_conv_buffer(context->xlate, (const char *)&input[i],
&inbytes_left,
(char *)inp_tmp, &outbytes_left);
MD4Transform(context->state, inp_tmp);
}
else {
MD4Transform(context->state, &input[i]);
}
}
idx = 0;
}
else
i = 0;
if (context->xlate) {
inbytes_left = outbytes_left = inputLen - i;
apr_xlate_conv_buffer(context->xlate, (const char *)&input[i],
&inbytes_left, (char *)&context->buffer[idx],
&outbytes_left);
}
else {
memcpy(&context->buffer[idx], &input[i], inputLen - i);
}
#endif
return APR_SUCCESS;
}
APU_DECLARE(apr_status_t) apr_md4_final(
unsigned char digest[APR_MD4_DIGESTSIZE],
apr_md4_ctx_t *context)
{
unsigned char bits[8];
unsigned int idx, padLen;
Encode(bits, context->count, 8);
#if APR_HAS_XLATE
context->xlate = NULL;
#endif
idx = (unsigned int) ((context->count[0] >> 3) & 0x3f);
padLen = (idx < 56) ? (56 - idx) : (120 - idx);
apr_md4_update(context, PADDING, padLen);
apr_md4_update(context, bits, 8);
Encode(digest, context->state, APR_MD4_DIGESTSIZE);
memset(context, 0, sizeof(*context));
return APR_SUCCESS;
}
APU_DECLARE(apr_status_t) apr_md4(unsigned char digest[APR_MD4_DIGESTSIZE],
const unsigned char *input,
apr_size_t inputLen)
{
apr_md4_ctx_t ctx;
apr_status_t rv;
apr_md4_init(&ctx);
if ((rv = apr_md4_update(&ctx, input, inputLen)) != APR_SUCCESS)
return rv;
return apr_md4_final(digest, &ctx);
}
static void MD4Transform(apr_uint32_t state[4], const unsigned char block[64])
{
apr_uint32_t a = state[0], b = state[1], c = state[2], d = state[3],
x[APR_MD4_DIGESTSIZE];
Decode(x, block, 64);
FF (a, b, c, d, x[ 0], S11);
FF (d, a, b, c, x[ 1], S12);
FF (c, d, a, b, x[ 2], S13);
FF (b, c, d, a, x[ 3], S14);
FF (a, b, c, d, x[ 4], S11);
FF (d, a, b, c, x[ 5], S12);
FF (c, d, a, b, x[ 6], S13);
FF (b, c, d, a, x[ 7], S14);
FF (a, b, c, d, x[ 8], S11);
FF (d, a, b, c, x[ 9], S12);
FF (c, d, a, b, x[10], S13);
FF (b, c, d, a, x[11], S14);
FF (a, b, c, d, x[12], S11);
FF (d, a, b, c, x[13], S12);
FF (c, d, a, b, x[14], S13);
FF (b, c, d, a, x[15], S14);
GG (a, b, c, d, x[ 0], S21);
GG (d, a, b, c, x[ 4], S22);
GG (c, d, a, b, x[ 8], S23);
GG (b, c, d, a, x[12], S24);
GG (a, b, c, d, x[ 1], S21);
GG (d, a, b, c, x[ 5], S22);
GG (c, d, a, b, x[ 9], S23);
GG (b, c, d, a, x[13], S24);
GG (a, b, c, d, x[ 2], S21);
GG (d, a, b, c, x[ 6], S22);
GG (c, d, a, b, x[10], S23);
GG (b, c, d, a, x[14], S24);
GG (a, b, c, d, x[ 3], S21);
GG (d, a, b, c, x[ 7], S22);
GG (c, d, a, b, x[11], S23);
GG (b, c, d, a, x[15], S24);
HH (a, b, c, d, x[ 0], S31);
HH (d, a, b, c, x[ 8], S32);
HH (c, d, a, b, x[ 4], S33);
HH (b, c, d, a, x[12], S34);
HH (a, b, c, d, x[ 2], S31);
HH (d, a, b, c, x[10], S32);
HH (c, d, a, b, x[ 6], S33);
HH (b, c, d, a, x[14], S34);
HH (a, b, c, d, x[ 1], S31);
HH (d, a, b, c, x[ 9], S32);
HH (c, d, a, b, x[ 5], S33);
HH (b, c, d, a, x[13], S34);
HH (a, b, c, d, x[ 3], S31);
HH (d, a, b, c, x[11], S32);
HH (c, d, a, b, x[ 7], S33);
HH (b, c, d, a, x[15], S34);
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
memset(x, 0, sizeof(x));
}
static void Encode(unsigned char *output, const apr_uint32_t *input,
unsigned int len)
{
unsigned int i, j;
apr_uint32_t k;
for (i = 0, j = 0; j < len; i++, j += 4) {
k = input[i];
output[j] = (unsigned char)(k & 0xff);
output[j + 1] = (unsigned char)((k >> 8) & 0xff);
output[j + 2] = (unsigned char)((k >> 16) & 0xff);
output[j + 3] = (unsigned char)((k >> 24) & 0xff);
}
}
static void Decode(apr_uint32_t *output, const unsigned char *input,
unsigned int len)
{
unsigned int i, j;
for (i = 0, j = 0; j < len; i++, j += 4)
output[i] = ((apr_uint32_t)input[j]) |
(((apr_uint32_t)input[j + 1]) << 8) |
(((apr_uint32_t)input[j + 2]) << 16) |
(((apr_uint32_t)input[j + 3]) << 24);
}
#if APR_CHARSET_EBCDIC
APU_DECLARE(apr_status_t) apr_MD4InitEBCDIC(apr_xlate_t *xlate)
{
xlate_ebcdic_to_ascii = xlate;
return APR_SUCCESS;
}
#endif